<!DOCTYPE HTML>
<html class="reftest-print"><head>
    <meta charset="utf-8">
    <title>Testcase for bug 1102791</title>
    <style type="text/css">

html,body {
    color:black; background-color:white; font-size:16px; padding:0; margin:0;
}

button {
  position: absolute;
  -moz-appearance: none;
  background: transparent;
  padding: 0;
  border-style:none;
}
button::before {
  position: absolute;
  content: "::before";
  width: 10px;
  height: 200em;
  border: 1px solid black;
}

    </style>
</head>
<body>

<button></button>

</body>
</html>
